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In the early stage of disease prevention and control, it can be sprayed with 15% triadimefon WP 1500-2000 times, or 70% thiosulfamethoxazole WP 1000 times and 75% chlorothalonil wettable powder 1000 times every 10 days. Once in 15 days, spray 2 to 3 times. Cabbage leaf blight usually has bright veins on the newly emerged young leaves, followed by mottled, diseased leaves are more deformed and the plants are dwarfed. In the early stage of onset, spray 20% of virus A wettable powder 500 times every 10 days for 2 consecutive times. In addition, we must prevent and control the transmission of locusts in time.
Disease Prevention and Control of Fennel and Chinese Cabbage
Fennel powdery mildew can generally be infected in the upper part of the plant, the more mature part of the first disease, the surface is a white powder spots, then gradually expanded, occupying the surface of most stems, leaves, and can be accumulated on the stem surface for a long time.